Williamson paid $850,000 for the property in Mar. 2008.
Williamson is a Canadian actress known for her role as Jessica Buchanan on the long running daytime series "One Life to Live." She's been on the show since 2003.
She has also appeared on Canadian television as well as in commercials for Tostitos and Pepsi. She attended the University of Toronto for a dual degree in psychology and women's studies.
She paid $990,000 for a condo in Central Harlem on Sept. 23.
According to BlockShopper.com, there were 65 condo sales in Tribeca in 2008, with a median sales price of $2 million.
Address: 303 Greenwich Street, Unit: 3a
Buyer(s): Lam and Brian
Seller(s): Williamson and Bree
Sale date: Sep. 22, 2009